Tire-mold.



P. D. THROPP.

TIRE MOLD. APPLIoATIoN FILED MAB. so, 190e.

Patented Feb. .2, 1909.

2 SHEETS-SHEET 1.

@WJ/wen? P. 1).THROP'P.

TIRE MOLD.

` APP1..IOATION I'ILLD MAR. 30, 1906.

91 1,182. e l Y Patented Feb. 2, 1909.

3. The pressure rin s 22, 23, are then placed in position wit the auxiliary pres- .sure rings 29, 30, thereon, and are forced toward one another by means of the bolts 26,`

where the strain on the tire is severe, when in use, the necessary pressure to make the tire firin and-tough when cured. The mold, with tire thereon, is then placed in a suitable vulcanizing kiln where it may be cured either by dry heat or steam, as may be desired. ln any event, the hot air or hot steam will ass throughthe wrapping tape or band anti) exert its influence directlyupon the tire material.

ln the form shown in Figs. 4, 5 and 6, the

core, denoted by 37, is made in one continuous hollow annular ring instead of in sections, as shown in Figs. 1 to 3, inclusive, and there is therefore no need of the ring 5 for binding the core sections together or for any equivalent of said ring. The other features, to wit; the mold sections, the pressure rings, the auxiliary pressure rings carried thereby, and the bolts for drawing the pressure rings toward each other, and the screws for adjusting the auxiliary pressure' rings, may be quite similar in structure to those shown and described in Figs. 1 to 3, inclusive, and will operate in practice in substantially the same manner as already described.

It is obvious that changes might be resorted to in the form and arrangement of the Several parts without departing from the spirit and scope of my invention; hence l do not wish to limit myself strictly to the structure herein shown and described, but

1. A tire mold comprising a core, mold sections arranged to press the opposite sides v`of the inner portion/o arranged to press the opposite sides of the tire in proximity to the outer edges of the 55 mold sections and means for forcing the mold sections and pressure rings tow ard the tire.

2. A tire mold comprising a core, mold sections arranged to press the opposite sides ofthe tire along its inner portion, pressure 60 rings for forcing the mold sections toward each other and additional pressure ringscarpoints, and exerting thereon at these points,-

the tire, pressure rings.,

aimez ried by the aforesaid pressure rings for pressing the opposite sides of the tire in proximity to the outer edges of the mold sections.

3. A .tire mold comprising a core, mold sections arranged. to engage the opposite sides of the tire along its inner portion and provided with depressions on their outer faces, pressure rings provided with projections adapted to entei the depressions in the outer faces of the mold sections, for tightening a wrapping tape or band, and additional pressure rings carried by the aforesaid pres-v sure rings in position to press against a wrapping tape or band in proximity to the outer edges of the mold sections and means for forcing the members of the two sets of pressure rings toward each other.

4. A tire mold comprising a core, mold sections adapted to press the tire upon opposite sides of the inner portion thereof, pressure rings, means for forcing the pressure rings toward the mold sections and thereby forcing the mold sections toward each other, additional pressure rings carried by the aforesaid pressure rings and means for adjusting the additional pressure rings toward and away from each other independently of the pressure rings which support them.

5. A tire mold comprising a core provided with an inwardly extending fin, mold sections arranged on opposite sides of the iin for forming the clencher edges of the tire, the said core sections extending only partially along the opposite sides of the core, pressure rings, means for forcing the pressure rings toward the mold sections and hence the mold sections toward the core and additional mold pressure rings adjustably secured to the aforesaid pressure rings.

6. A tire mold comprising a core, formed in sections, the several sections being provided with inwardly extended fins, an annular ring `secured to the fins of the core sections for maintaining the core sections assembled to form a continuous ring, mold sections for forming the clencher rings of the tire, the said mold sections being separated by the said fins and ring, and pressure rings, located exterior to the core sections, means for forcing the pressure rings toward each other and hence the core sections toward the aforesaid fins and connecting ring.

In testimony, that l claim the foregoing as my invention, I have signed my rname in presence of two witnesses, this 27th day of- March, 1908.

j PETER D. THROPP.

Witnesses RACHEL SUMMER, CLIFFORD W. LEE.

iic 

